/**
 * tools/add-dependency.js
 * Tool for adding a dependency to a task
 */

import { createErrorResponse, handleApiResult, withToolContext } from '@tm/mcp';
import { z } from 'zod';
import { resolveTag } from '../../../scripts/modules/utils.js';
import { addDependencyDirect } from '../core/task-master-core.js';
import { findTasksPath } from '../core/utils/path-utils.js';

/**
 * Register the addDependency tool with the MCP server
 * @param {Object} server - FastMCP server instance
 */
export function registerAddDependencyTool(server) {
	server.addTool({
		name: 'add_dependency',
		description: 'Add a dependency relationship between two tasks',
		parameters: z.object({
			id: z.string().describe('ID of task that will depend on another task'),
			dependsOn: z
				.string()
				.describe('ID of task that will become a dependency'),
			file: z
				.string()
				.optional()
				.describe(
					'Absolute path to the tasks file (default: tasks/tasks.json)'
				),
			projectRoot: z
				.string()
				.describe('The directory of the project. Must be an absolute path.'),
			tag: z.string().optional().describe('Tag context to operate on')
		}),
		execute: withToolContext(
			'add-dependency',
			async (args, { log, session }) => {
				try {
					log.info(
						`Adding dependency for task ${args.id} to depend on ${args.dependsOn}`
					);
					const resolvedTag = resolveTag({
						projectRoot: args.projectRoot,
						tag: args.tag
					});
					let tasksJsonPath;
					try {
						tasksJsonPath = findTasksPath(
							{ projectRoot: args.projectRoot, file: args.file },
							log
						);
					} catch (error) {
						log.error(`Error finding tasks.json: ${error.message}`);
						return createErrorResponse(
							`Failed to find tasks.json: ${error.message}`
						);
					}

					// Call the direct function with the resolved path
					const result = await addDependencyDirect(
						{
							// Pass the explicitly resolved path
							tasksJsonPath: tasksJsonPath,
							// Pass other relevant args
							id: args.id,
							dependsOn: args.dependsOn,
							projectRoot: args.projectRoot,
							tag: resolvedTag
						},
						log
						// Remove context object
					);

					// Log result
					if (result.success) {
						log.info(`Successfully added dependency: ${result.data.message}`);
					} else {
						log.error(`Failed to add dependency: ${result.error.message}`);
					}

					// Use handleApiResult to format the response
					return handleApiResult({
						result,
						log,
						errorPrefix: 'Error adding dependency',
						projectRoot: args.projectRoot,
						tag: resolvedTag
					});
				} catch (error) {
					log.error(`Error in addDependency tool: ${error.message}`);
					return createErrorResponse(error.message);
				}
			}
		)
	});
}
